2torial #0658: Learn2 Patch a Hole (Continued) Method 1: Plaster Wall Add the finishing touches Here's where you earn your stripes, folks. A master plasterer can accomplish this finishing step quickly and effortlessly. So, here goes: Wet the paintbrush. Alternate using the wet brush, and the trowel to create a smooth surface that's flush with the surrounding wall and not bulging. Brush some water over the surface to finish it all off.   Prime and paint the area to match the rest of the wall.   Method 2 - Step 1